body{
    background-color: #eee;
}
#img1{
    transition:All 0.6s ease-in-out;-webkit-transition:All 0.6s ease-in-out;-moz-transition:All 0.6s ease-in-out;-o-transition:All 0.6s ease-in-out;-ms-transition:All 0.6s ease-in-out;
}
#img1:hover{
    transform:rotate(360deg);-webkit-transform:rotate(360deg);-moz-transform:rotate(360deg);-o-transform:rotate(360deg);-ms-transform:rotate(360deg);
}